diff --git a/casanovo/denovo/model_runner.py b/casanovo/denovo/model_runner.py
index 62bc0c59..46f086e9 100644
--- a/casanovo/denovo/model_runner.py
+++ b/casanovo/denovo/model_runner.py
@@ -116,7 +116,7 @@ def train(
             self.trainer.save_checkpoint(
                 os.path.join(
                     self.config.model_save_folder_path,
-                    f"train-run-final-{self.trainer.current_epoch}.ckpt"
+                    f"train-run-final-{self.trainer.current_epoch}.ckpt",
                 )
             )